Can't support this enough! Raising food and cultivating ecosystems rather than energy- and sweat-intensive grass is better for you, the world, and all the creatures living on it.
Movements that focus on these ideas include the permaculture and Slow Foods movements. Some books I would recommend include Paradise Lot and Gaia's Garden, Second Edition. They are fun, easy to read, and can result in a lot of fresh fruit for you (with little to no work!)

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I always had the feeling i'm not doing enough with my life. Eventhough i'm an idealist, I never know where to start in making the world a better place because it seems there is so much to do. So if you have an idea, tell me about it. I will execute the most popular idea of each month for one year! I'm a puppet to your ideals!